61 citations · 279 across the 9 of their papers we have counts for
9 papers
On Tunnelling In Two-Throat Warped Reheating
Peter Langfelder
We revisit the energy transfer necessary for the warped reheating scenario in a two-throat geometry. We study KK mode wavefunctions of the full two-throat system in the Randall--Su…
A note on spherically symmetric naked singularities in general dimension
Peter Langfelder, Robert B. Mann
We discuss generalizations of the recent theorem by Dafermos (hep-th/0403033) forbidding a certain class of naked singularities in the spherical collapse of a scalar field. Employi…
Massive Gravitino Propagator in Maximally Symmetric Spaces and Fermions in dS/CFT
L. Anguelova, P. Langfelder
We extend the method of calculation of propagators in maximally symmetric spaces (Minkowski, dS, AdS and their Euclidean versions) in terms of intrinsic geometric objects to the ca…
Does the Tachyon Matter?
Alex Buchel, Peter Langfelder, Johannes Walcher
We study time-dependent solutions of Einstein-Maxwell gravity in four dimensions coupled to tachyon matter--the Dirac-Born-Infeld Lagrangian that provides an effective description…
On Time-dependent Backgrounds in Supergravity and String Theory
Alex Buchel, Peter Langfelder, Johannes Walcher
Time-dependent solutions of supergravity and string theory are studied. The examples are obtained from de Sitter deformation of gauge/gravity dualities, analytical continuation of…
A Remark on Smoothing Out Higher Codimension Branes
Olindo Corradini, Alberto Iglesias, Zurab Kakushadze +1
We discuss some issues arising in studying (linearized) gravity on non-BPS higher codimension branes in an infinite-volume bulk. In particular, such backgrounds are badly singular…
Gravity on a 3-brane in 6D Bulk
Olindo Corradini, Alberto Iglesias, Zurab Kakushadze +1
We study gravity in codimension-2 brane world scenarios with infinite volume extra dimensions. In particular, we consider the case where the brane has non-zero tension. The extra s…
A Remark on Non-conformal Non-supersymmetric Theories with Vanishing Vacuum Energy Density
Olindo Corradini, Alberto Iglesias, Zurab Kakushadze +1
We discuss non-conformal non-supersymmetric large N gauge theories with vanishing vacuum energy density to all orders in perturbation theory. These gauge theories can be obtained v…
Gravitational Higgs Mechanism
Zurab Kakushadze, Peter Langfelder
We discuss the gravitational Higgs mechanism in domain wall background solutions that arise in the theory of 5-dimensional Einstein-Hilbert gravity coupled to a scalar field with a…